SOLUTION: train A traveled 20 mi h faster than train B. train A takes 3 hoursto go between two cities, and train B takes 4 hours to travel the same distance. how fast does each train travel?

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Question 562726: train A traveled 20 mi h faster than train B. train A takes 3 hoursto go between two cities, and train B takes 4 hours to travel the same distance. how fast does each train travel? please help me!!!! i've tried everything it says in the book!!!
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
A = B + 20

d = r * t ___ the distances are the same

3A = 4B ___ substituting ___ 3(B + 20) = 4B ___ 3B + 60 = 4B